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Date:   Mon, 20 Sep 2021 10:12:51 +0200
From:   Borislav Petkov <bp@alien8.de>
To:     "Luck, Tony" <tony.luck@intel.com>
Cc:     Yazen Ghannam <Yazen.Ghannam@amd.com>, X86 ML <x86@kernel.org>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/4] x86/mce: Get rid of machine_check_vector
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References: <20210917105355.2368-1-bp@alien8.de>
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On Sun, Sep 19, 2021 at 09:57:09PM -0700, Luck, Tony wrote:
> Does this __reserved field do anything useful? It seems to
> just be an annoyance that must be updated each time a new
> bit is added. Surely the compiler will see that these bitfields
> are in a "u64" and do the math and skip to the right boundary
> without this.

It is there to tell you how many bits you have left so that you don't
have to count each time. And updating it each time is simply Ctrl-x in
vim.

:-)

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette